Oral short-acting contraceptive tablets, if it is just now is taking the 1st box of pills, usually 7 days after taking the pills, the contraceptive effect will only start on the 8th day. Oral short-acting contraceptives, such as drospirenone ethinyl estradiol tablets, deoxyprogesterone ethinyl estradiol tablets, if in accordance with the doctor’s instructions did not miss the dose, oral 21 days after stopping the drug for 7 days and then take the next box of pills, usually do not need to take other contraceptive measures, the contraceptive failure rate is small, belong to the contraceptive effect of the very good a way. Oral short-acting contraceptives is the most important thing is to do not miss the dose, a daily tablet at a relatively fixed time to take. If you miss a dose, you should follow the doctor’s instructions to take a replacement pill as soon as possible, or take strict contraceptive measures afterward.